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    <title>Document</title>
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    <script src="./tool.js"></script>
    <script>
        var arr =[1,2,3,4];
        var cloneArr = clone(arr);
        cloneArr[0] = 23
        console.log(arr,cloneArr);

        var obj = {name:'ss',age:20};
        var cloneObj = clone(obj);
        console.log(obj,cloneObj)
        obj.name = 'sk'
        console.log(obj,cloneObj)
    </script>
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